apt update
apt-cache policy kubeadm
apt-get install -s kubeadm=1.16.2-00
kubectl drain master --ignore-daemonsets
kubeadm upgrade plan
kubeadm upgrade apply v1.16.2
apt-get install -s kubelet=1.16.2-00 kubectl=1.16.2-00
systemctl restart kubelet
kubectl uncordon master
kubectl drain node01 --ignore-daemonsets
apt-get install -s kubeadm=1.16.2-00
apt-get install -s kubelet=1.16.2-00
kubeadm upgrade node config --kubelet-version v1.16.2-00
apt-get install -s kubectl=1.16.2-00
systemctl restart kubelet
kubectl uncordon node01